package atm.dao;

import java.sql.*;

public abstract class BaseDAO {
    protected Connection con;
    protected PreparedStatement statement;
    protected ResultSet rs;
    public Connection getConnection() {
// 1. 加载驱动
        try {
            Class.forName("com.mysql.cj.jdbc.Driver");
            // 2. 创建连接
            con = DriverManager.getConnection(
                    "jdbc:mysql://localhost:3306/atm?userSSL=true&useUnicode=true&characterEncoding=UTF8&serverTimezone=GMT",
                    "root", "926445");
            System.out.println("con:" + con);
        } catch (ClassNotFoundException | SQLException e) {
            e.printStackTrace();
        }
        return con;
    }
    public void close() {
        if (rs != null) {
            try {
                rs.close();
            } catch (SQLException throwables) {
                throwables.printStackTrace();
            }
        }
        if (statement != null) {
            try {
                statement.close();
            } catch (SQLException throwables) {
                throwables.printStackTrace();
            }
        }
        if (con != null) {
            try {
                con.close();
            } catch (SQLException throwables) {
                throwables.printStackTrace();
            }
        }
    }
    public void close(Connection con, Statement statement) {
        if (statement != null) {
            try {
                statement.close();
            } catch (SQLException throwables) {
                throwables.printStackTrace();
            }
        }
        if (con != null) {
            try {
                con.close();
            } catch (SQLException throwables) {
                throwables.printStackTrace();
            }
        }
    }
    public void close(Connection con, Statement statement, ResultSet rs) {
        if (rs != null) {
            try {
                rs.close();
            } catch (SQLException throwables) {
                throwables.printStackTrace();
            }
        }
        if (statement != null) {
            try {
                statement.close();
            } catch (SQLException throwables) {
                throwables.printStackTrace();
            }
        }
        if (con != null) {
            try {
                con.close();
            } catch (SQLException throwables) {
                throwables.printStackTrace();
            }
        }
    }
    public void setAutoCommit(boolean autoCommit) {
        try {
            con.setAutoCommit(autoCommit);
        } catch (SQLException throwables) {
            throwables.printStackTrace();
        }
    }
    public void commit() {
        try {
            con.commit();
        } catch (SQLException throwables) {
            throwables.printStackTrace();
        }
    }
    public void rollback() {
        try {
            con.rollback();
        } catch (SQLException throwables) {
            throwables.printStackTrace();
        }
    }
}
